Aluminum foil surface quality detection device and detection method

Abstract

The invention provides an aluminum foil surface quality detection device and method. The aluminum foil surface quality detection device comprises an unwinding roller, a detection platform and a winding roller which are sequentially arranged, the first deflection guide roller, the conveying roller, the tension roller, the first balance roller, the second balance roller and the second deflection guide roller are sequentially arranged on the detection platform, the first deflection guide roller is arranged on the side close to the unwinding roller, and the second deflection guide roller is arranged on the side close to the deflection guide roller; and the linear array scanner is arranged between the first balance roller and the second balance roller and is used for longitudinally scanning the aluminum foil coiled material to acquire aluminum foil surface data and transmitting the aluminum foil surface data to a detection platform for quality detection. Compared with the prior art, the aluminum foil surface defect detection efficiency and accuracy are higher, and the production quality of the aluminum foil is improved.

Description

Technical Field

[0001] The present invention is applicable to the technical field of aluminum foil detection, and in particular relates to an aluminum foil surface quality detection device and a detection method. Background Art

[0002] With the development of technology, in the era of pursuing fast charging and high energy density batteries, the poor surface quality of aluminum foil leads to uneven coating and wrinkles of varying degrees in the coating stage of the battery, which greatly reduces the production efficiency and quality. The requirements for the actual surface quality of the positive electrode collector aluminum foil are becoming increasingly stringent, and there is an urgent need for a quantitative standard for the surface quality of aluminum foil. Therefore, a quantitative standard is needed for various defects on the surface of aluminum foil, including waves, bubbles, collapsed edges, wrinkles, roughness and other surface defects.

[0003] However, the current surface quality detection method for aluminum foil mainly uses an offline flatness meter to perform laser single-point distance measurement, and solves the range of the distance extreme value to obtain a single-point extreme value instead of the overall surface quality of the aluminum foil. This test method cannot measure the overall surface quality of the aluminum foil and quantify the results, and has low detection efficiency and accuracy.

[0004] Therefore, there is an urgent need for a new aluminum foil surface quality detection device and detection method to solve the above technical problems. Summary of the invention

[0005] The invention provides an aluminum foil surface quality detection device and a detection method, aiming to improve the efficiency and accuracy of aluminum foil surface defect detection.

[0006] In a first aspect, an aluminum foil surface quality detection device is provided, the aluminum foil surface quality detection device comprising an unwinding roller, a detection platform and a winding roller which are arranged in sequence, the unwinding roller is used to place an aluminum foil coil to be detected, the detection platform is used to perform quality detection on the aluminum foil coil, and the winding roller is used to wind up the aluminum foil coil after being detected by the detection platform;

[0007] The detection platform includes a test bench and a first deflector roller, a conveying roller, a tension roller, a first balancing roller, a second balancing roller, a second deflector roller, and a linear array scanner arranged between the first balancing roller and the second balancing roller, which are arranged in sequence on the test bench; the first deflector roller is arranged on a side of the test bench close to the unwinding roller, and the second deflector roller is arranged on a side of the test bench close to the deflector roller; the linear array scanner is communicatively connected with the test bench, and the linear array scanner is used to perform a longitudinal scan on the aluminum foil coil to collect aluminum foil surface data, and transmit the aluminum foil surface data to the test bench for quality inspection.

[0008] Preferably, the tension applied by the tension roller to the aluminum foil coil is 0.69 kgf / mm 2 .

[0009] Preferably, the line array scanner comprises a first line array scanner and a second line array scanner which are spaced apart from each other, and the first line array scanner and the second line array scanner are sequentially arranged between the first balancing roller and the second balancing roller.

[0010] Preferably, the distance between the first balancing roller and the second balancing roller is 1.5 m.

[0011] Preferably, the test bench includes a first guide rail and a second guide rail, the first guide rail and the second guide rail have the same height, and the first guide rail is located on the inner side of the second guide rail, the first deflection roller, the conveying roller, and the tension roller are arranged on the first guide rail, and the first balance roller and the second balance roller are arranged on the second guide rail.

[0012] Preferably, the height of the unwinding roller and the height of the winding roller are greater than the height of the first deflector roller, the height of the conveying roller, the height of the tension roller and the height of the second deflector roller, and the height of the first balancing roller and the second balancing roller are greater than the height of the unwinding roller and the height of the winding roller.

[0013] In a second aspect, the present invention further provides a method for detecting the surface quality of an aluminum foil. The method for detecting the surface quality of an aluminum foil is based on the device for detecting the surface quality of an aluminum foil as described in any one of the above embodiments. The method for detecting the surface quality of an aluminum foil comprises the following steps:

[0014] S1. placing the aluminum foil coil to be inspected on the aluminum foil surface quality inspection device, so that the aluminum foil coil to be inspected moves at a uniform speed from the unwinding roller to the winding roller;

[0015] S2, applying tension to the aluminum foil coil by a tension roller to eliminate the internal stress of the aluminum foil coil;

[0016] S3, scanning the aluminum foil coil longitudinally by the linear array scanner to obtain aluminum foil surface data;

[0017] S4. Acquire the aluminum foil surface data through a test bench, and perform quality inspection based on the aluminum foil surface data to obtain an aluminum foil quality inspection result.

[0018] Preferably, in step S3, before the aluminum foil coil is longitudinally scanned, it is first determined whether the error of the linear array scanner exceeds a preset threshold, and if so, the error of the linear array scanner is calibrated.

[0019] Preferably, in step S3, the linear array scanner collects the surface data of the aluminum foil to meet the following conditions:

[0020]

[0021] Δh=h(t)-H-(d);

[0022]

[0023] Wherein, T represents the total time; L represents the detection distance of the aluminum foil coil; v represents the longitudinal moving speed of the aluminum foil coil; Δh represents the longitudinal height difference of the aluminum foil coil at time t; h(t) represents the distance from the linear array scanner to the aluminum foil coil at time t; H represents the distance from the linear array scanner to the first balance roller; d represents the thickness of the aluminum foil; H(average) represents the average longitudinal height of the aluminum foil coil; f represents the operating frequency of the linear array scanner; W(x) represents the surface data of the aluminum foil of the aluminum foil coil at the width direction coordinate x.

[0024] Preferably, in step S3, the preset threshold satisfies:

[0025] m=p*L*L (X) *d;

[0026]

[0027] Wherein, m represents the weight of the aluminum foil coil, p represents the aluminum foil density constant, L(X) represents the width of the aluminum foil coil, g represents the gravity acceleration constant, F represents the tension applied by the tension roller, α represents the angle between the gravity of the aluminum foil coil and the tension T, and h′ represents the preset threshold value.

[0028] Compared with the prior art, the present invention uses an aluminum foil surface quality detection device, including an unwinding roller, a detection platform and a winding roller arranged in sequence, the unwinding roller is used to place the aluminum foil coil to be detected, the detection platform is used to perform quality detection on the aluminum foil coil, and the winding roller is used to collect the aluminum foil coil after detection; a first deflection roller, a conveying roller, a tension roller, a first balance roller, a second balance roller and a second deflection roller are arranged in sequence on the detection platform, the first deflection roller is arranged on the side close to the unwinding roller, and the second deflection roller is arranged on the side close to the deflection roller; a linear array scanner is arranged between the first balance roller and the second balance roller, the linear array scanner is used to perform longitudinal scanning on the aluminum foil coil to collect aluminum foil surface data, and transmit the aluminum foil surface data to the detection platform for quality detection. The present invention has higher efficiency and higher accuracy in detecting surface defects of aluminum foil, and improves the production quality of aluminum foil. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings. The above and other aspects of the present invention will become clearer and easier to understand through the detailed description made in conjunction with the following drawings. In the accompanying drawings:

[0030] Figure 1 It is a structural schematic diagram of an aluminum foil surface quality detection device provided by an embodiment of the present invention;

[0031] Figure 2 is a top view of an aluminum foil surface quality detection device provided by an embodiment of the present invention;

[0032] Figure 3 It is a flowchart of the aluminum foil surface quality detection method provided by an embodiment of the present invention.

[0033] In the figure, 100, aluminum foil surface quality detection device, 1, unwinding roller, 2, first deflection roller, 3, conveying roller, 4, tension roller, 5, first balancing roller, 6, second balancing roller, 7, second deflection roller, 8, winding roller, 9, first linear array scanner, 10, second linear array scanner, 11, test bench, 12, detection platform, 13, ground, 14, first guide rail, 15, second guide rail, 16, computer. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] Embodiment 1

[0036] Please refer to Figure 1-Figure 2 The present invention provides an aluminum foil surface quality detection device 100, which comprises an unwinding roller 1, a detection platform 12 and a rewinding roller 8 which are arranged in sequence, wherein the unwinding roller 1 is used to place an aluminum foil coil to be detected, the detection platform 12 is used to perform quality detection on the aluminum foil coil, and the rewinding roller 8 is used to rewind the aluminum foil coil after being detected by the detection platform 12, and the aluminum foil coil runs on the aluminum foil surface quality detection device 100 at a uniform speed of 5 mm / min;

[0037] The detection platform 12 includes a test bench 11 and a first deflector roller 2, a conveying roller 3, a tension roller 4, a first balancing roller 5, a second balancing roller 6, a second deflector roller 6, and a linear array scanner arranged between the first balancing roller 5 and the second balancing roller 6, which are sequentially arranged on the test bench 11. The first deflector roller 2 is arranged on a side close to the unwinding roller 1, and the second deflector roller 6 is arranged on a side of the test bench 11 close to the deflector roller.

[0038] The linear array scanner is in communication connection with the test bench 11, and is used to longitudinally scan the aluminum foil coil to collect aluminum foil surface data, and transmit the aluminum foil surface data to the test bench 11 for quality inspection. The aluminum foil surface quality inspection device 100 is placed on the ground 13.

[0039] Specifically, the first deflector roller 2 and the second deflector roller 6 are used to guide the aluminum foil coil to run along a preset trajectory, the conveying roller 3 is used to convey the aluminum foil coil, the tension roller 4 is used to apply tension to the aluminum foil coil to eliminate internal stress, and the first balancing roller 5 and the second balancing roller 6 are used to adjust the running balance of the aluminum foil coil.

[0040] The aluminum foil coil is continuously scanned by a linear array scanner while running at a low and uniform speed. Multiple lines are scanned for plane structure construction, and the surface data of the aluminum foil is collected and processed by software to solve the waviness. Then, surface defects such as waves, bubbles, collapsed edges, wrinkles, and roughness on the surface of the aluminum foil are quantified, and each defect is calibrated in advance to effectively avoid the high risks brought by the defects and improve production efficiency.

[0041] The aluminum foil surface quality detection device 100 also includes a control console 16, which is used to control the start and stop, winding and unwinding, stress application, and real-time reception of data from the first scanner 9 and the second linear array scanner 10 of the aluminum foil surface quality detection device 100, and perform waviness calculation and surface quality simulation of the aluminum foil coil.

[0042] In the embodiment of the present invention, the tension roller 4 is driven by a servo motor to apply tension to the aluminum foil coil, and the tension applied by the tension roller 4 to the aluminum foil coil is 0.69 kgf / mm 2 , in order to eliminate the internal stress of the aluminum foil coil, so as to maximize the display of the true surface state of the aluminum foil coil.

[0043] In the embodiment of the present invention, the line array scanner includes a first line array scanner 9 and a second line array scanner 10 which are spaced apart from each other, and the first line array scanner 9 and the second line array scanner 10 are sequentially arranged between the first balancing roller 5 and the second balancing roller 6. The first line array scanner 9 is installed at one fourth of the test spacing of the aluminum foil coil (i.e., the spacing between the first balancing roller 5 and the second balancing roller 6), and the second line array scanner 10 is installed at one half of the test spacing of the aluminum foil coil.

[0044] In the embodiment of the present invention, the distance between the first balancing roller 5 and the second balancing roller 6 is 1.5 m, which can more effectively provide sufficient support and stabilize the operation of the aluminum foil coil.

[0045] In an embodiment of the present invention, the test bench 11 includes a first guide rail 14 and a second guide rail 15, the first guide rail 14 and the second guide rail 15 have the same height, and the first guide rail 14 is located on the inner side of the second guide rail 15, the first deflection roller 2, the conveying roller 3, and the tension roller 4 are arranged on the first guide rail 14, the first balancing roller 5 and the second balancing roller 6 are arranged on the second guide rail 15, the first balancing roller 5 and the second balancing roller 6 on the second guide rail 15 can move freely in the running direction of the aluminum foil coil, and each roller is controlled by a hydraulic cylinder on the guide rail for accurately controlling the position of each roller to test the surface quality of the aluminum foil under different roller spacing conditions, so as to better balance the state of the aluminum foil coil during operation.

[0046] In an embodiment of the present invention, the height of the unwinding roller 1 and the height of the winding roller 8 are greater than the height of the first deflector roller 2, the height of the conveying roller 3, the height of the tension roller 4 and the height of the second deflector roller 7, and the height of the first balancing roller 5 and the second balancing roller 6 are greater than the height of the unwinding roller 1 and the height of the winding roller 8.

[0047] Compared with the prior art, the present invention uses an aluminum foil surface quality detection device 100, which includes an unwinding roller, a detection platform and a winding roller, which are arranged in sequence. The unwinding roller is used to place the aluminum foil coil to be detected, the detection platform is used to perform quality detection on the aluminum foil coil, and the winding roller is used to collect the aluminum foil coil after detection; a first deflection roller, a conveying roller, a tension roller, a first balance roller, a second balance roller and a second deflection roller are arranged in sequence on the detection platform, the first deflection roller is arranged on the side close to the unwinding roller, and the second deflection roller is arranged on the side close to the deflection roller; a linear array scanner is arranged between the first balance roller and the second balance roller, and the linear array scanner is used to perform longitudinal scanning on the aluminum foil coil to collect aluminum foil surface data, and transmit the aluminum foil surface data to the detection platform for quality detection. The present invention has higher efficiency and higher accuracy in detecting surface defects of aluminum foil, and improves the production quality of aluminum foil.

[0048] Embodiment 2

[0049] Please refer to Figure 3 The embodiment of the present invention further provides a method for detecting the surface quality of an aluminum foil. The method for detecting the surface quality of an aluminum foil is based on the device for detecting the surface quality of an aluminum foil 100 as described in any one of the above embodiments. The method for detecting the surface quality of an aluminum foil comprises the following steps:

[0050] S1, placing the aluminum foil coil to be tested on the aluminum foil surface quality testing device 100 and moving it at a uniform speed;

[0051] S2, applying tension to the aluminum foil coil by a tension roller to eliminate the internal stress of the aluminum foil coil;

[0052] S3, scanning the aluminum foil coil longitudinally by the linear array scanner to obtain aluminum foil surface data;

[0053] S4. Acquire the aluminum foil surface data through a test bench, and perform quality inspection based on the aluminum foil surface data to obtain an aluminum foil quality inspection result.

[0054] In the embodiment of the present invention, in step S3, before the aluminum foil coil is longitudinally scanned, it is first determined whether the error of the linear array scanner exceeds a preset threshold, and if so, the error of the linear array scanner is calibrated.

[0055] In the embodiment of the present invention, in step S4, the linear array scanner collects the surface data of the aluminum foil to meet the following conditions:

[0056]

[0057] Δh=h(t)-H-(d);

[0058]

[0059] Wherein, T represents the total time for quality inspection of the aluminum foil coil; L represents the inspection distance of the aluminum foil coil; v represents the longitudinal moving speed of the aluminum foil coil; Δh represents the longitudinal height difference of the aluminum foil coil at time t; h(t) represents the distance from the linear array scanner to the aluminum foil coil at time t; H represents the distance from the linear array scanner to the first balancing roller; d represents the thickness of the aluminum foil; H(average) represents the mean longitudinal height of the aluminum foil coil; f represents the operating frequency of the linear array scanner; W(x) represents the surface data of the aluminum foil of the aluminum foil coil at the width direction coordinate x.

[0060] In the embodiment of the present invention, in step S3, the preset threshold satisfies:

[0061] m=p*L*L (X) *d;

[0062]

[0063] Wherein, m represents the weight of the aluminum foil coil, p represents the aluminum foil density constant, L(X) represents the width of the aluminum foil coil, g represents the gravity acceleration constant, F represents the tension applied by the tension roller, α represents the angle between the gravity of the aluminum foil coil and the tension T, and h′ represents the preset threshold value.

[0064] Exemplarily, the distance from the first linear array scanner to the aluminum foil coil is defined as h9(t), and the distance from the second linear array scanner to the aluminum foil coil is defined as h10(t). When the aluminum foil coil is stationary or running at a constant speed, the data of the first linear array scanner and the second linear array scanner are compared in real time, and h10(t)-h9(t)≤h'mm, that is, h10(t)-h9(t)>0.001mm, indicating that the linear array scanner has a large error. At this time, the equipment is stopped for recalibration. Repeat the calibration process until h10(t)-h9(t)<0.001mm to ensure the accuracy of the linear array scanner.

[0065] The aluminum foil surface quality detection method is based on the aluminum foil surface quality detection device 100 in the above embodiment, and can achieve the same technical effect. Please refer to the description in the above embodiment and will not be repeated here.

[0066] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0067] The embodiments of the present invention are described above in conjunction with the accompanying drawings. What is disclosed is only the preferred embodiment of the present invention. However, the present invention is not limited to the above-mentioned specific implementation manner. The above-mentioned specific implementation manner is only illustrative rather than restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms and equivalent changes without departing from the scope of protection of the purpose of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. An aluminum foil surface quality detection device, comprising an unwinding roller, a detection platform and a winding roller arranged in sequence, wherein the unwinding roller is used to place an aluminum foil coil to be detected, the detection platform is used to perform quality detection on the aluminum foil coil, and the winding roller is used to wind up the aluminum foil coil after being detected by the detection platform; characterized in that: The detection platform includes a test bench and a first deflector roller, a conveying roller, a tension roller, a first balancing roller, a second balancing roller, a second deflector roller, and a linear array scanner arranged between the first balancing roller and the second balancing roller, which are arranged in sequence on the test bench; the first deflector roller is arranged on a side of the test bench close to the unwinding roller, and the second deflector roller is arranged on a side of the test bench close to the deflector roller; the linear array scanner is communicatively connected with the test bench, and the linear array scanner is used to perform a longitudinal scan on the aluminum foil coil to collect aluminum foil surface data, and transmit the aluminum foil surface data to the test bench for quality inspection.

2. The aluminum foil surface quality detection device according to claim 1, characterized in that: The tension applied by the tension roller to the aluminum foil coil is 0.69 kgf / mm 2 .

3. The aluminum foil surface quality detection device according to claim 1, characterized in that: The line array scanner comprises a first line array scanner and a second line array scanner spaced apart from each other, wherein the first line array scanner and the second line array scanner are sequentially disposed between the first balancing roller and the second balancing roller.

4. The aluminum foil surface quality detection device according to claim 1, characterized in that: The distance between the first balancing roller and the second balancing roller is 1.5 m.

5. The aluminum foil surface quality detection device according to claim 1, characterized in that: The test bench includes a first guide rail and a second guide rail, the first guide rail and the second guide rail have the same height, and the first guide rail is located on the inner side of the second guide rail, the first deflection roller, the conveying roller, and the tension roller are arranged on the first guide rail, and the first balance roller and the second balance roller are arranged on the second guide rail.

6. The aluminum foil surface quality detection device according to claim 1, characterized in that: The height of the unwinding roller and the height of the winding roller are greater than the height of the first deflector roller, the height of the conveying roller, the height of the tension roller and the height of the second deflector roller, and the height of the first balancing roller and the second balancing roller are greater than the height of the unwinding roller and the height of the winding roller.

7. A method for detecting the surface quality of aluminum foil, characterized in that: The aluminum foil surface quality detection method is based on the aluminum foil surface quality detection device according to any one of claims 1 to 6, and the aluminum foil surface quality detection method comprises the following steps: S1. placing the aluminum foil coil to be inspected on the aluminum foil surface quality inspection device, so that the aluminum foil coil to be inspected moves at a uniform speed from the unwinding roller to the winding roller; S2, applying tension to the aluminum foil coil by a tension roller to eliminate the internal stress of the aluminum foil coil; S3, scanning the aluminum foil coil longitudinally by the linear array scanner to obtain aluminum foil surface data; S4. Acquire the aluminum foil surface data through a test bench, and perform quality inspection according to the aluminum foil surface data to obtain an aluminum foil quality inspection result.

8. The aluminum foil surface quality detection method according to claim 7, characterized in that: In step S3, before the aluminum foil coil is longitudinally scanned, it is first determined whether the error of the linear array scanner exceeds a preset threshold. If so, the error of the linear array scanner is calibrated.

9. The method for detecting the surface quality of aluminum foil according to claim 7, characterized in that: In step S3, the linear array scanner collects the surface data of the aluminum foil to meet the following conditions: Δh=h(t)-H-(d); Wherein, T represents the total time for quality inspection of the aluminum foil coil; L represents the inspection distance of the aluminum foil coil; v represents the longitudinal moving speed of the aluminum foil coil; Δh represents the longitudinal height difference of the aluminum foil coil at time t; h(t) represents the distance from the linear array scanner to the aluminum foil coil at time t; H represents the distance from the linear array scanner to the first balancing roller; d represents the thickness of the aluminum foil; H(average) represents the mean longitudinal height of the aluminum foil coil; f represents the operating frequency of the linear array scanner; W(x) represents the surface data of the aluminum foil of the aluminum foil coil at the width direction coordinate x.

10. The aluminum foil surface quality detection method according to claim 8, characterized in that: In step S3, the preset threshold satisfies: m=p*L*L (X) *d; Wherein, m represents the weight of the aluminum foil coil, p represents the aluminum foil density constant, L(X) represents the width of the aluminum foil coil, g represents the gravity acceleration constant, F represents the tension applied by the tension roller, α represents the angle between the gravity of the aluminum foil coil and the tension T, and h′ represents the preset threshold value.

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